DocumentCode
789652
Title
Improved design method for continuous-time quadrature bandpass ΣΔ ADCs
Author
Reekmans, S. ; Maeyer, J. De ; Rombouts, P. ; Weyten, L.
Author_Institution
CAS-Group, Gent Univ., Belgium
Volume
41
Issue
8
fYear
2005
fDate
4/14/2005 12:00:00 AM
Firstpage
461
Lastpage
463
Abstract
In continuous-time quadrature bandpass ΣΔ ADCs it is desirable to limit the number of cross-couplings. This can be achieved by implementing the loop as a cascade of complex integrators with only real coefficients. It is shown that this may result in a very poor approximation of the desired noise transfer function, because the effect of the DAC pulse is not taken into account correctly. A simple implementation that solves this problem is proposed.
Keywords
analogue-digital conversion; sigma-delta modulation; transfer functions; complex integrators; continuous-time quadrature bandpass ΣΔ ADC; improved design; noise transfer function;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20050270
Filename
1425345
Link To Document